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Brock and Reba's oldest daughter, who initially is looking forward to her senior year of high school before learning that she is pregnant. She marries her boyfriend, Van Montgomery, and they move in with Cheyenne's mom, Reba. Cheyenne gives birth to their daughter, Elizabeth, after going into labor on graduation day. At the beginning of the series, she comes across as a typical dumb blonde and is self-centered and irresponsible. However, her intelligence and sense of responsibility improve as she raises her daughter and studies dentistry in college. She is highly sensitive, especially when she is insulted (mainly by Kyra, her younger sister). Cheyenne later helps out at a homeless shelter, improving her shallowness greatly. When she comes to the realization that she is an alcoholic, she's inspired to discontinue doing dentistry for her major, and decides to study counseling for those affected by alcohol and drugs.

Dentistry was her initial major in college due to her father being a dentist. Her mother, Reba, became extremely worried about this career choice, pointing out that dentistry takes eight years to complete and Cheyenne has a tendency to not stick too long in an interest (this came to be true three seasons later when Cheyenne changed majors).

After taking care of Ruby and her family in the episode No Good Deed, Cheyenne wanted to take up volunteer work, she started working at a soup kitchen cleaning dishes, she eventually started volunteering at a retirement home.